Coating for Aqueous Inkjet Transfer

Patent metadata

Field	Value
Publication number	US-2016159084-A1
Application number	US-201615019760-A
Country	US
Kind code	A1
Filing date	Feb 9, 2016
Priority date	Sep 20, 2013
Publication date	Jun 9, 2016
Grant date	—

Abstract

An aqueous ink transfer process includes coating the surface of an image transfer member (ITM) with a coating composition to a first thickness, the coating composition including a hydrophilic composition and a surfactant, partially drying the coating composition to reduce its thickness and then applying aqueous ink onto the coating composition. The coating composition in the vicinity of the applied ink swells by absorbing water from the ink, and can further exhibit reduced adherence to the ITM. The ink is partially dried and then transferred onto a substrate.

First claim

What is claimed is:

1 . An aqueous ink transfer process comprising:
coating the surface of an image transfer member (ITM) with a coating composition to a first thickness, the coating composition including a hydrophilic composition and a surfactant; partially drying the coating composition to a reduced second thickness; applying aqueous ink onto the coating composition; swelling the coating composition by absorbing water from the ink; partially drying the ink; and transferring the ink onto a substrate.

2 . The aqueous ink transfer process of claim 1 , wherein the first thickness is between 1 μm and 10 μm.

3 . The aqueous ink transfer process of claim 2 wherein the second thickness of between 0.1 μm and 1 μm.

4 . The aqueous ink transfer process of claim 1 , wherein the step of transferring the ink onto a substrate includes transferring part of the coating composition swollen by absorbing water from the ink with the ink.

5 . The aqueous ink transfer process of claim 1 , wherein the surface of the ITM has a low surface energy.

6 . The aqueous ink transfer process of claim 1 , wherein the step of applying aqueous ink includes applying the ink in an imagewise manner.

7 . The aqueous ink transfer process of claim 1 , in which the aqueous ink includes a colorant in a liquid solvent, wherein the hydrophilic composition includes an absorption agent in a liquid carrier, the absorption agent adapted to absorb the solvent in the aqueous ink.

8 . The aqueous ink transfer process of claim 7 , wherein the absorption agent includes a starch.

9 . The aqueous ink transfer process of claim 8 , wherein the starch is a starch consisting of predominantly amylopectin.

10 . The aqueous ink transfer process of claim 8 , wherein the starch includes a starch selected from the group including corn starch, potato starch, rice starch, wheat flour, rice flour and corn flour.

11 . An aqueous ink transfer process comprising:
coating the surface of an image transfer member (ITM) with a coating composition, the coating composition including a hydrophilic composition and a surfactant; applying aqueous ink onto the coating composition; after applying the ink, reducing the adherence of the coating composition to the surface of the ITM at the location of the applied ink; partially drying the ink; and transferring the ink onto a substrate.

12 . The aqueous ink transfer process of claim 11 , wherein the surface of the ITM has a low surface energy.

13 . The aqueous ink transfer process of claim 11 , wherein the step of transferring the ink onto a substrate includes transferring part of the coating composition having reduced adherence to the surface of the ITM.

14 . An aqueous ink transfer process comprising:
coating the surface of an image transfer member (ITM) with a coating composition including a hydrophilic composition and a surfactant; applying aqueous ink onto the coating composition; absorbing water from the ink into the coating contacted by the ink; partially drying the ink to remove additional water from the ink; and transferring the ink onto a substrate.

15 . The aqueous ink transfer process of claim 14 , wherein the step of transferring the ink onto a substrate includes transferring part of the coating composition contacted by the ink with the ink.

16 . The aqueous ink transfer process of claim 14 , wherein the surface of the ITM has a low surface energy.

17 . The aqueous ink transfer process of claim 14 , in which the aqueous ink includes a colorant in a liquid solvent, wherein the hydrophilic composition includes an absorption agent in a liquid carrier, the absorption agent adapted to absorb the solvent in the aqueous ink.

18 . The aqueous ink transfer process of claim 17 , wherein the absorption agent includes a starch.

Assignees

• Xerox Corp

Inventors

• Liu Chu-Heng

Classifications

• C09D5/00

  Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced {(electrically insulating plastics, resins or waxes H01B3/30)}; Filling pastes · CPC title

• C09D7/40

  Additives · CPC title

• C09D11/30 Primary

  Inkjet printing inks · CPC title

• B41M5/0017

  Application of ink-fixing material, e.g. mordant, precipitating agent, on the substrate prior to printing, e.g. by ink-jet printing, coating or spraying · CPC title

• B41J11/0015

  for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing (selective coating B41J2/2114) · CPC title